Look on Ebay, I got both front and rear for 180.00 shipping included. There is a guy selling them all the time. That was a buy it now deal. They have set ups for pre 69, I had changed my K frame to a 73 so I used the later of course. It went in very easy. The one tip I will give is to set your car up on ramps and then pre fit and mark everything. It is a real pain getting the parts too line up with the suspension hanging. The set I bought was ADDCO.
I love the feel, it even helped take up some mushy steering issues I have due to /6 torsion bars. Best part I have added to the car!